Welcome to M-N-Kappa’s documentation!


M-N-Kappa is a free online moment curvature calculation tool.

Try M-N-Kappa calculation tool here!

It is based on the moment curvature analysis method, which is used to determine the load-deformation behaviour of concrete sections based on non linear material stress-strain relationships.

A moment curvature diagram shows information about the bending stiffness of reinforced concrete beams and the amount of nonlinear behaviour of a section. The nonlinear behaviour in reinforced conrete sections are:

  • cracking of the concrete
  • yielding of the reinforcement
  • plastic deformation of the concrete
  • crushing of the concrete

An example of a moment curvature diagram is shown below.

Example of a moment curvature diagram

Example of a moment curvature diagram.

Indices and tables